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In my opinion it spools down way to fast and it sounds like something is binding internally. Did you check if it ran free before installation?, it should have been pre-lubed at the factory. Did you check the clearance moving it axially?, give it a spin?. My guess is something is binding internally or the bearings are pooched because normally the spool down is not so abrupt.

F1 tech is my domain haha, F1 engines DO use Hydraulic or Pnumatic (depending on the team) to close valves (a few years ago they did both) Under the hybrid era, Valves must be mechanically opened, but there pneumatically closed, so they can be closed faster and harder than a cam would allow, whats the point of all that boost and energy recovery when it all leaks by valves closing as is traditional with a normal cam shaft.

F1 get the best of both worlds, each system has its advantages and disadvantges.

If you do a bit of fishing online you can find photos of F1 engine camshafts, and you aint ever seen lobe profiles like it

On another note i saw a comment about laser ignition this is bollox, and a tech that will never make it, HCCI or Hermerogeneous Charge Compression and Ignition is a spark less way of ignighting fuel, sticking with F1, Merceidies and Ferrari and Honda all use HCCI at some level now mercedies is obviously the best it operates much better, if you listen to a MERC of the throttle in breaking zones and listen carefull you can hear the engines switching from SPARK to HCCI and vice versa, its even more apparant on the HONDA listen to that fucker of throttle sounds like the days of the blown diffusers HCCI is way superior to any other kind of ignition but its only recently the technology has been around that it can be done, for more than 40years HCCI has been on some form of bench.

For those who dont know HCCI is exactly the way Diesel Engines ignite or detonate there fuel, without a spark, just cold fuel into a red hot pocket of air and KABOOM, well petrol and other fuels can be ignighted this way aswell, only its not so simple.

These 2 together pneumatic valves and HCCI is estimated to be between 5 and 25% more efficent all around, more power less fuel, less nocking, less risk of detonation, relativly low cylinder pressures, lower stress on engine components in particular to the piston, where detonation no longer hppens over the pistons center to push down, but burns way more unitform pressing the WHOLE surface of the piston down.

I have no doubt the trolls will soon be here to abuse me so come and get it, ill see if i can find the photos for yall of the cam profiles, and the link to the HCCI information for you all﻿"

Camless engines have been around for some time now-a lot of large ship engines use solenoid operated valves.

I designed and built my own camless 4 stroke engine 28 years ago,using Honda's XR350 engine as a base-it had only one moving part +plus the drive gears of course,and rotated a 1/4 the engine RPM.It also only required 1/10 of the power that was needed to run the original valve train.

Defiantly sounds like a bearing problem Grum--sounds like one of the rotors is touching the housing.The oil coming out like that,is a sure sign of a bearing and seal problem there--maybe the endfloat was not set correctly ?

Defiantly sounds like a bearing problem Grum--sounds like one of the rotors is touching the housing.The oil coming out like that,is a sure sign of a bearing and seal problem there--maybe the endfloat was not set correctly ?

Did you shim the compressor and exhaust housing up correctly ?.

Brad

Hi Brad.

The " cassette " was allegedly factory ballanced etc. All that I had to do was put my inlet and exhaust chambers on to the ends.

I double checked all clearances and fully primed the centre bearing before the final start up. The unit failed within seconds....

I've been out to my favourite BMW breaker this morning and bought a second hand one.... less play in it than the new one!!

As usual the weather has turned nasty again, a case of " rain stopped play "

Nice... an engine like that could run for decades. Being a farm boy I have a great appreciation for craftsmanship and things that work. For me that engine is a work of art and they don't build them like that anymore. Thank you.

Tinman

Quote

Rotary valve system--the only way to go

You read my mind and a rotary valve becomes feasible once we understand the work from the heat of expansion can be equivalent to the work of a transformation without the high temperatures. The GEET inventor claimed frost started forming on the exhaust of his motor in which case a modified brass ball valve with teflon seals and a little lube might work?.

It gives us options not normally present within the realm of high temperature internal combustion engines while reducing the cost of components. How far could we take this... an injection molded or 3D printed plastic engine?. We are only limited by our imagination and I think you have a very good one.

@GrumNice... an engine like that could run for decades. Being a farm boy I have a great appreciation for craftsmanship and things that work. For me that engine is a work of art and they don't build them like that anymore. Thank you.

You're welcome.

It's a rotary valve.

The only engine type I have not had " hands on " experience with is a Brayton cycle engine. ( reciprocating )

My collection of early Lister engines now sees 3 at over 100 years old, and still running. I also have a " Canadian " hopper Spec 401 Lister of 1911 vintage.

Graham, being sad on such a moment is very understandable, but don't stay sad for to long, 13 year is a respectable age for a labrador.Looking at the picture he had a very enjoyable life with you guys, so be thankfull instead lateron.

The only way I could imagine it working would be a "tacking" scenario ,if it runs strait up the river that would be really amazing !!and if its truethis would be a cheaper transport [with no motor needed just the proper foil design.

The only way I could imagine it working would be a "tacking" scenario ,if it runs strait up the river that would be really amazing !!and if its truethis would be a cheaper transport [with no motor needed just the proper foil design.

I dont see it working-not even with tacking,as it wouldnt matter if the water was flowing under the boat,or the boat was moving across the water--either way,there would only need to be motion between the boat and water. This being the case,you would have a boat moving through water,with no apparent power/energy source.

The land yacht going down wind faster than the wind ,is a no brainer,when you understand that the sail surface is traveling in the opposite direction to that of which the wind is blowing,and the land yacht is moving.

There is also the fact that the land yacht has two mediums to work with,where it takes energy from the wind,and transfers it to the wheel's,which then push against the ground.The boat only has the water,and so ,there saying we take energy from the moving water,and transfer it to the moving water .This is like trying to lift yourself of the ground by pulling on your own shoe laces.